ibkgab001:
You won't hear any sound when timing belt is about to give up

nkemdi89:

It's indicates, check your ac switch it blinks, then when you start the vehicle it makes noise like a screeching sound.

promizchild:

Experience will teach u more abt timing belt, it depends on the type of car you are driving, bt often time when your car just off d ignition without any notice and u suspect d timing belt, d Best thing is to pack and check it first because any attempt to restart d ignition will lead to bending of valve if nt condemned ur engine top.

leeyack:
7 Car Signs You Should Not Ignore

A Slapping Noise
This kind of indicates a dying tire. Its tread is separating from the body of the tire. it may turn into a giant steel-reinforced Weed Eater. It can cause massive. This could cause severe damage to the body and cars framework. Ignoring this kind of sound is doing your car a disservice.


Pancake- Syrup-like smell
This kind of sweet scent emanating from the engine most likely signals problem with the cars cooling system. The smell and sweet taste of most automotive antifreeze/coolant issues from its ethelyne glycol.the leak source could range from an old, cracked, worn or ruptured radiator hose to a water pump on about to shut down. Ignoring this could get the car overheating.

Fluid under your car
A shallow droplets under your car can mean signal a problem. When you notice fluid under your car, try noting its color and and supposed location under the car. Get the fluid on your finger, rub it a bit between your fingers and smell it. In most cases, its often water issuing from the air-conditioning condenser. If the color is clear and oily then it’s probably power steering fluid, check for leakage around the pump or power steering rack but If it’s darker, slippery, and it’s within a recent oil change session, it could be a droplets of clean oil dropping from the fact that either the mechanic damaged the oil drain plug or the oil filter wasn’t properly installed.


Reddish and other Kinds of fluid droppings
Reddish-brown fluid and a lightly oily feel is your automatic transmission showing that there might be a bad seal puncture in the line running to the Trans cooler. Additionally, if the ATF fluid also has a burnt smell, it could indicate that the transmission probably need an overhaul. If there is an oily fluid on the inside sidewall of your tire, that’s most likely leaking brake fluid. Lost brake fluid could be because of air in the brake lines and could mean almost zero braking power. This should be corrected immediately.


Whining noise
This kind of high-pitched whining noise or squealing emanating from the engine bay and increases with engine speed is often an accessory belt about to park up. Since modern cars today have only one belts turning myriad devices including power steering, water pump, air conditioning compressor, and alternator, a broken belt could mean a complete shutdown of the car. However if the high-pitch squeal occurs when you tap the brake lightly while at speed, then it is that the brake pads or shoes are all worn out. This squeal emanates from a tab of metal built into the pad that gets exposed as material wears out. If the noise changes or disappears, visit your mechanic.


Grinding Noise
If the squealing noise is ignored brakes and they go silent, the next noise that would occur from them is a powerful grinding. The last of the pad has been completely worn and the metal backing plate is now clamping directly onto the brake disc. Braking effectiveness is greatly reduced and the car is now in grave danger and your repair bill would go up, too as the discs will need to be replaced as well. However if you hear a grinding, clicking, or rumbling noise when you take a tight turn, it’s likely a worn out constant-velocity joint on a front-wheel-drive car. A CV joint makes the front wheels to both receive power and turn. Ignoring this for a long time could result in your car CV joint pulling out.


http://www.automobileglobe.com/7-car-signs-you-shudnt-ignore/